shell.created event never includes pid (publishes the pre-spawn info)

Version

opencode2 v0.0.0-beta-17519 (branch beta, commit 6106cb6)

Summary

The shell.created event publishes the pre-spawn Info object, so pid is always undefined for subscribers. The POST /api/shell HTTP response does include the pid, so the omission only affects event consumers.

Where

In packages/core/src/shell.ts:

• L205-214: info is built before the spawn, with no pid.
• L236-239: after the spawn, the pid is attached to a copy kept in session.info:
  info: produce(info, (draft) => { draft.pid = handle.pid }).
• L331: the event is published with the original object, discarding the copy that carries the pid:
  yield* bus.publish(Shell.Event.Created, { info }).

pid is optional in the schema (packages/schema/src/shell.ts:36-49), so this is not a type error — the field is simply always absent on the event.

Impact

A plugin cannot correlate a shell with an OS process from events alone. ctx.shell exposes only hook("create.before") (packages/plugin/src/promise/shell.ts:15-17), and the plugin Context (packages/plugin/src/promise/plugin.ts:17-33) has no shell client or server URL, so there is no in-process way to fetch the pid afterwards.

The workaround is scanning ps for a child of the server process that is its own process-group leader, matching start time and command — racy, and it breaks whenever the spawner is not the plugin's own process.

Suggested fix

Publish the post-spawn info. session is already in scope — it is used on the very next line.

-              yield* bus.publish(Shell.Event.Created, { info })
+              yield* bus.publish(Shell.Event.Created, { info: session.info })

Repro

1. Subscribe to events (in-process plugin via ctx.event.subscribe(), or the event stream).
2. POST /api/shell with any long-running command.
3. The HTTP response contains "pid": <n>; the shell.created event for the same shell id has no pid.

Start in packages/core/src/shell.ts at the post-spawn update around lines 236-239 and the shell.created publish around line 331. Read packages/schema/src/shell.ts to confirm pid is optional, then verify that the event publishes the post-spawn session info. Done means shell.created includes the same pid as the POST /api/shell response.